1，a change of pace 节奏变换

    You can‘t do these chemistry experiments all day long. You certainly need a change of pace.

    2， a far cry from 相距甚远

    The published book is far cry from the early manuscript.

    3， and how 的确

    A： She‘s a good dancer.

    B： and how.

    4， a matter of time 时间问题

    It is only a matter of time.

    5， a phone call away 一个电话之远，愿意过来帮忙。

    If you need my help， do let me know. Just remember I am a phone call away.

    6， a while back 不久以前

    7，all along 一直